K-Shell Line Distribution of Heavy Elements along the Galactic Plane Observed with Suzaku
K-Shell Line Distribution of Heavy Elements along the Galactic Plane Observed with Suzaku
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DOI：
10.1093/pasj/65.1.19
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发表时间：
2012-09
影响因子：
2.3
通讯作者：
H. Uchiyama;M. Nobukawa;T. Tsuru;K. Koyama
中科院分区：
文献类型：
--
作者：
H. Uchiyama;M. Nobukawa;T. Tsuru;K. Koyama
本文报道了S、Ar、Ca和Fe的类He和类H离子的K壳层线强度沿着银道面的全球分布。从轮廓，我们清楚地分离银河系中心的X射线发射（GCXE）和银河系的山脊的X射线发射（GRXE）。S、Ar、Ca和Fe的类He K\alpha线沿着银道面的强度分布近似相似，而类H Ly\alpha线的强度分布则不相似。特别是，H-样的Ly$\alpha$的S和Fe的配置文件显示出显着的对比度;一个大的过量的Fe和几乎没有过量的S线在GCXE相比，GRXE。虽然显著的K壳层线由1 keV和7 keV温度等离子体表示，但GCXE和GRXE之间的这两个温度并不相等。实际上，GCXE和GRXE的光谱分析表明，GCXE中的1 keV等离子体的温度低于GRXE中的温度，而7 keV等离子体的温度则相反。
We report the global distribution of the intensities of the K-shell lines from the He-like and H-like ions of S, Ar, Ca and Fe along the Galactic plane. From the profiles, we clearly separate the Galactic center X-ray emission (GCXE) and the Galactic ridge X-ray emission (GRXE). The intensity profiles of the He-like K$\alpha$ lines of S, Ar, Ca and Fe along the Galactic plane are approximately similar with each other, while not for the H-like Ly$\alpha$ lines. In particular, the profiles of H-like Ly$\alpha$ of S and Fe show remarkable contrast; a large excess of Fe and almost no excess of S lines in the GCXE compared to the GRXE. Although the prominent K-shell lines are represented by $\sim$1 keV and $\sim$7 keV temperature plasmas, these two temperatures are not equal between the GCXE and GRXE. In fact, the spectral analysis of the GCXE and GRXE revealed that the $\sim$1 keV plasma in the GCXE has lower temperature than that in the GRXE, and vice versa for the $\sim$7 keV plasma.